Molecular astrophysics : State of the art and challenges

Francois Lique (Université du Havre)

Recent Space and ground based telescope have opened new windows of observation for wavelengths ranging from far infrared to sub-millimeter with spatial and spectral resolutions previously unmatched. To make the most of these observations, an accurate knowledge of the physical and chemical processes occuring in the inter- stellar medium (ISM) is essential. In this presentation, I will show what are the current needs in astrophysics in terms on molecular data and how accurate data are a crucial parameters for the determination of physical conditions in molecular clouds.